<template>
	<view>
		<view class="search-box">
		  <uni-search-bar @input="input" :radius="100" cancelButton='none'></uni-search-bar>
		</view>
    <!-- 搜索建列表 -->
    <view class="sugg-list" v-if="searchList.length !== 0">
      <view class="sugg-item" v-for="(item,i) in searchList" :key="i" @click="gotoDetail(item.goods_id)">
        <view class="goods_name">{{item.goods_name}}</view>
        <uni-icons type="arrowright" size="16"></uni-icons>
      </view>
    </view>
    <!-- 搜索历史区域 -->
    <view class="history-box" v-else>
      <!-- 标题区域 -->
      <view class="history-title">
        <text>搜索历史</text>
        <uni-icons type="trash" size="17" @click="cleanHistory" ></uni-icons>
      </view>
      <!-- 列表区域 -->
      <view class="history-list" >
        <!-- <uni-tag :text="item" v-for="(item,i) in historyList" :key="i"></uni-tag> -->
        <uni-tag :text="item" v-for="(item,i) in histories" :key="i" @click="gotoGoodsList(item)"></uni-tag>
      </view>
    </view>
    
	</view>
</template>

<script>
	export default {
		data() {
			return {
				timer: null,
        // 搜索关键字
        kw: '',
        // 搜索列表数据
        searchList: [],
        // 搜索历史
        historyList: []
			};
		},
    computed: {
      histories() {
        return [...this.historyList].reverse()
      }
    },
    onLoad() {
     this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]' )
    },
    methods: {
      input(e) {
        // console.log(e.value)
        // 防抖处理
        clearTimeout(this.timer)
       this.timer = setTimeout(() => {
          this.kw = e.value
          // console.log(this.kw)
          this.getSearchList()
        },500)
      },
      // 获取搜索列表数据
     async getSearchList() {
        // 先判断输入框是否有值
        if(this.kw.length === 0) {
          this.searchList = []
          return
        }
       const {data : res } = await uni.$http.get('/api/public/v1/goods/qsearch',{query: this.kw})
       if(res.meta.status !== 200) return uni.$showMsg()
       this.searchList = res.message
       this.saveSearchHistory()
      },
      // 跳转到详情页
      gotoDetail(goods_id) {
        uni.navigateTo({
          url: '/subpkg/goods_detail/goods_detail?goods_id' + goods_id
        })
      },
      // 对搜索的数据历史进行保存
      saveSearchHistory() {
        // this.historyList.push(this.kw)
        // 解决搜索关键字重复
       const set = new Set(this.historyList)
       // 先对原有的关键词删除
       set.delete(this.kw)
       // 在吧新的关键词添加上去
        set.add(this.kw)
        this.historyList = Array.from(set)
       // console.log(set)
       // 对搜索历史进行持久化存储
       uni.setStorageSync('kw',JSON.stringify(this.historyList))
      },
      // 清空搜索记录
      cleanHistory() {
        // 清空data保存的数据
        this.historyList = []
        // 清空本地数据
        uni.setStorageSync('kw','[]')
      },
      // 跳转到商品列表页面
      gotoGoodsList(kw) {
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?query=' + kw
        })
      }
    }
	}
</script>

<style lang="scss">
.search-box {
  position: sticky;
  top: 0;
  z-index: 999;
}
.sugg-list {
  padding: 0 5px;
  .sugg-item {
    font-size: 12px;
    padding: 13px 0;
    border-bottom: 1px solid #efefef;
    display: flex;
    align-items: center;
    justify-content: space-between;
    .goods_name {
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      margin-right: 3px;
    }
  }
}
.history-box {
  padding: 0 5px;
  .history-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 40px;
    font-size: 13px;
    border-bottom: 1px solid #efefef;
  }
  .history-list {
    display: flex;
    flex-wrap: wrap;
    .uni-tag {
      margin-top: 5px;
      margin-right: 5px;
    }
  }
}
</style>
